one of SBA server MOH not work suddenly.

Check SBA server event log don't have relate MOH error and main site and some SBA servers MOH is work. 

How to trace the problem? Debugging log?

reboot SBA ?  

Gateway didn't have change recently and MOH suppose is play by SBA server right?

Thanks.

• Edited by Jo Tse Monday, July 20, 2015 3:27 AM subject

but outbound SIP REINVITE messages  is ok, outbound sip re-invite is from SBA to Gateway?

Inound is from gateway to SBA?

Check to log look gateway send reinvite to SBA but sba not response .

• Edited by Jo Tse Monday, July 20, 2015 12:43 PM change

We found some different sub-net network can work on inbound call on hold, but user is home on same SBA pool.

Do you know any firewall rules for inbound call on hold? new subnet inbound call on hold failed.

Thanks.